US20140167449A1 - Device for absorbing mechanical energy for motor vehicles - Google Patents
Device for absorbing mechanical energy for motor vehicles Download PDFInfo
- Publication number
- US20140167449A1 US20140167449A1 US14/107,467 US201314107467A US2014167449A1 US 20140167449 A1 US20140167449 A1 US 20140167449A1 US 201314107467 A US201314107467 A US 201314107467A US 2014167449 A1 US2014167449 A1 US 2014167449A1
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- US
- United States
- Prior art keywords
- body section
- force
- deformation
- deformed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
- B62D21/152—Front or rear frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/08—Front or rear portions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
- B62D25/20—Floors or bottom sub-units
Definitions
- DE 20 46 251 C3 discloses a device of said type.
- a deformable front part of bodies for motor vehicles is provided, which deformable front part is arranged in a spare-wheel well of the motor vehicle and, in the event of frontal collisions, prevents the spare wheel, in a horizontal position, from being pushed through the bulkhead into the passenger compartment or into a fuel tank.
- the force flow in the event of a crash is not dissipated by the spare wheel but rather is absorbed by the bumper via a metal support plate and a metal reinforcement plate.
- the spare wheel is guided rearward and upward in the event of a crash.
- the device has a lug 5 whose cross section likewise has a honeycomb-like cavity 2 .
- the lug 5 interacts with a projection 6 on the first body section 3 such that, during a deformation of the device 1 , the projection 6 is at least partially surrounded by the deformed lug 5 .
- the device 1 has a support surface 9 which interacts with a further support surface 13 formed on the first body section 3 .
- a gap dl is present between the lug 5 and the projection 6
- a gap d 2 is present between the support surface 9 and the support surface 13 .
- the device 1 in the event of a crash, the device 1 , owing to its construction, realizes a force fit between the body section 3 and the device and a further force fit between the device and the body section 4 , such that a force-fitting connection is generated between the two body sections 3 , 4 , and a vertical deflection movement of one of the two body sections 3 , 4 is prevented.
- the device is constructed such that it performs a rotational movement about a centre of rotation in the manner of a flap lever, and such that the device 1 is clamped in each case to the body sections 3 , 4 .
- the device 1 is manufactured from aluminum or an aluminum alloy in order that it accounts for as little as possible of the overall weight of the motor vehicle.
- that wall 15 of the pocket 11 which has the centre of rotation 12 is provided at least partially with a relatively large material thickness, in order that the device does not break during the rotation or during the deformation.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Vibration Dampers (AREA)
- Body Structure For Vehicles (AREA)
Abstract
Description
- This application claims priority of German Patent Application No. 10 2012 112 419.1, filed Dec. 17, 2012, which is incorporated by reference herein in its entirety.
- The present invention relates to a device for absorbing mechanical energy for motor vehicles, wherein the device has a honeycomb-like cavity structure and is arranged between a first body section and a second body section.
- DE 20 46 251 C3 discloses a device of said type. In the already-known device for absorbing mechanical energy, a deformable front part of bodies for motor vehicles is provided, which deformable front part is arranged in a spare-wheel well of the motor vehicle and, in the event of frontal collisions, prevents the spare wheel, in a horizontal position, from being pushed through the bulkhead into the passenger compartment or into a fuel tank. It is provided here that the force flow in the event of a crash is not dissipated by the spare wheel but rather is absorbed by the bumper via a metal support plate and a metal reinforcement plate. It is also provided that the spare wheel is guided rearward and upward in the event of a crash.
- DE 102 21 299 C1 discloses a crash support which has a protective and energy-absorbing action in the event of a collision. For this purpose, the already-known crash support has a hook-in connection at the front end and has, at the rear free end, a support with respect to a beam.
- In the case of the already-known devices, it may be a problem that a displacement of the components occurs in the event of a crash, and the energy generated by the crash is not dissipated to the body of the motor vehicle.
- It is therefore an object of the present invention to improve a device of the generic type mentioned in the introduction such that the energy from a crash or from an accident situation is dissipated to the body structure of the motor vehicle.
- Said object is achieved by means of a device having the features of
patent claim 1. Advantageous refinements emerge from the subclaims. It is provided here that the device can be deformed during the absorption of mechanical energy, wherein the deformation generates a force-fitting connection between the two body sections. By means of said measure, it is achieved that the body sections are not displaced over one another. The body sections should not be displaced over one another in the event of a crash because this would absorb less energy from the crash. The present invention ensures that the body sections are not displaced over one another. - In one advantageous refinement of the subject matter of the invention, a lug is formed whose cross section has a honeycomb-like cavity. Here, the lug interacts with a projection on the first body section such that, during a deformation of the device, the projection is at least partially surrounded by the deformed lug. By means of this measure, a force-fitting connection is realized between the first body section and the device.
- The device has a pocket into which the second body section projects, wherein the pocket has two walls which are substantially parallel to one another. It is provided here that one wall of the pocket has a centre of rotation about which the device can be deformed in a rotational manner during a deformation, and wherein the other wall of the pocket can be placed in abutment against the second body section such that a force-fitting connection can be generated between the two body sections. By means of this measure, a force-fitting connection is realized between the device and the second body section, whereby the force flow path between the two body sections is established and a force-fitting connection is realized between the two body sections.
- The device according to the invention is characterized in that, after a deformation of the device, the force flow path between the first body section and the second body section is established.
- In a particularly advantageous refinement of the device according to the invention, it is provided that that wall of the pocket which has the centre of rotation at least partially has a greater material thickness than the other parts of the honeycomb-like cavity structure. It is provided here that the device is manufactured from aluminum or an aluminum alloy.
- It is preferable for the first body section to be a luggage compartment region of the motor vehicle and for the second body section to be connected to a passenger compartment region of the motor vehicle.
- A further advantageous refinement of the device according to the invention provides that a central receptacle is provided for a screw connection to the second body section. By means of this measure, only one screw is required for the mounting of the device according to the invention.
- The present invention will be explained in more detail on the basis of an exemplary embodiment and in conjunction with the appended drawing, in which:
-
FIG. 1 is a schematic sectional illustration of the device according to the invention in the installed position thereof; -
FIG. 2 is a sectional illustration, corresponding toFIG. 1 , of the device according to the invention with an introduction of force having partially taken place, and -
FIG. 3 a is a further sectional illustration of the device, and -
FIG. 3 b is a schematic illustration for explaining the mode of operation of the device according to the invention. -
FIG. 1 is a sectional illustration showing adevice 1 for absorbing mechanical energy for motor vehicles. Here, thedevice 1 has a honeycomb-like cavity structure 2 and is arranged between afirst body section 3 and asecond body section 4. Thefirst body section 3 is in this case for example a luggage compartment region of the motor vehicle, whereas thesecond body section 4 is connected to a passenger compartment region of the motor vehicle. The arrow denoted by thereference 7 inFIG. 1 indicates the action of force on thedevice 1 in the event of a crash. The concept is for thedevice 1 to be deformed during the absorption of mechanical energy and, in so doing, to generate a force-fitting connection between the twobody sections lug 5 whose cross section likewise has a honeycomb-like cavity 2. As will be explained in more detail below, thelug 5 interacts with aprojection 6 on thefirst body section 3 such that, during a deformation of thedevice 1, theprojection 6 is at least partially surrounded by thedeformed lug 5. Furthermore, thedevice 1 has asupport surface 9 which interacts with afurther support surface 13 formed on thefirst body section 3. In the installed position of thedevice 1 illustrated inFIG. 1 , in a non-deformed state, a gap dl is present between thelug 5 and theprojection 6, and a gap d2 is present between thesupport surface 9 and thesupport surface 13. The gap dimensions dl and d2 are required for the installation of thedevice 1. As can also be seen fromFIG. 1 , thedevice 1 is fixedly connected to thesecond body section 4 by means of a screw connection through acentral receptacle 8. Thecentral receptacle 8 has the effect that only a single screw is required for the mounting and installation of thedevice 1. In this way, the installation of thedevice 1 is simplified considerably. -
FIG. 2 shows an illustration in which a part of the force from a crash has already been introduced into thedevice 1. Here, by contrast toFIG. 1 , thecomponent 3 has already been displaced to the right, and the gap dimension d1 has been closed. Theprojection 6 has been placed in engagement with thelug 5 such that thelug 5 has deformed. During the deformation of thelug 5, the latter has, owing to the honeycomb-like cavity structure 2, bent around theprojection 6, and thelug 5 at least partially surrounds theprojection 6. The force in the direction of thearrow 7 is thus conducted from thebody section 3 into thedevice 1. The deformation of thelug 5 is indicated by the arrow with thereference sign 10. -
FIGS. 3 a and b show the operational principle of thedevice 1. InFIG. 3 a, by contrast toFIGS. 1 and 2 , thedevice 1 is illustrated without theadjoining body sections FIG. 3 corresponds to the situation illustrated inFIG. 2 . Here, thelug 5 of thedevice 1 has already been deformed. Thesupport surface 9 is situated in the front region of thedevice 1. As can also be seen fromFIG. 3 a, thedevice 1 has apocket 11 into which thesecond body section 4 projects in the installed position. Thepocket 11 has twowalls wall 15 of thepocket 11 comprises a centre ofrotation 12 about which thedevice 1 can be deformed in a rotational manner during a deformation in the event of a crash. After the rotation caused by the deformation, theother wall 14 of thepocket 11 bears against thesecond body section 4, such that a force-fitting connection is realized between thedevice 1 and thebody section 4. - To explain the function of the
device 1 in more detail,FIG. 3 b shows a schematic illustration which explains the operational principle of thedevice 1 in the event of a crash. As already stated, when an introduction of force has partially taken place via thebody section 3, theprojection 6 is initially placed in engagement with thelug 5. As a result, thelug 5 deforms and performs a partial rotational movement in a direction toward thebody section 3, as indicated by theforce arrow 10′ inFIG. 3 b. During a further introduction of force via thebody section 3, thesupport surface 13 of thebody section 3 comes into abutment against thesupport surface 9 of thedevice 1, as indicated by the arrow with thereference numeral 16. After thebody section 3 has come into contact, by way of itssupport surface 13, with thedevice 1, thedevice 1 rotates about its centre ofrotation 12, as indicated by themotion arrow 10. As a result, thewall 14 of thepocket 11 moves in the direction of themotion arrow 15 toward thesecond body section 4, such that thebody section 4 is clamped in thepocket 11 between the twowalls device 1 to perform an intrinsic rotation or a structure-induced rotation about the centre ofrotation 12 in the manner of a flap lever, and to thus connect thebody sections - Thus, in the event of a crash, the
lug 5 is initially deformed by theprojection 6 of the body section, and thus thedevice 1 is placed in operative connection with thebody section 3. A further movement of thebody section 3 to the right inFIG. 3 b brings thesupport surface 13 of thebody section 3 into engagement with thesupport surface 9 of thedevice 1. As a result, an intrinsic rotation of thedevice 1 about the centre ofrotation 12 is effected, and thewall 14 of thepocket 11 abuts against thesecond body section 4 and clamps the latter therein. As a result, thebody section 4 is clamped to thepocket 11 by thewalls body section 3, no further displacement of thebody sections body section 3 has the effect that said force is dissipated via thedevice 1 into thebody section 4. - It is the main concept of the invention that, in the event of a crash, the
device 1, owing to its construction, realizes a force fit between thebody section 3 and the device and a further force fit between the device and thebody section 4, such that a force-fitting connection is generated between the twobody sections body sections device 1 is clamped in each case to thebody sections device 1 is manufactured from aluminum or an aluminum alloy in order that it accounts for as little as possible of the overall weight of the motor vehicle. As can be seen inFIGS. 1 , 2 and 3 a, thatwall 15 of thepocket 11 which has the centre ofrotation 12 is provided at least partially with a relatively large material thickness, in order that the device does not break during the rotation or during the deformation.
Claims (9)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012112419 | 2012-12-17 | ||
DE102012112419.1A DE102012112419B4 (en) | 2012-12-17 | 2012-12-17 | Device for absorbing mechanical energy for motor vehicles |
DE102012112419.1 | 2012-12-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20140167449A1 true US20140167449A1 (en) | 2014-06-19 |
US9039071B2 US9039071B2 (en) | 2015-05-26 |
Family
ID=50821234
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/107,467 Expired - Fee Related US9039071B2 (en) | 2012-12-17 | 2013-12-16 | Device for absorbing mechanical energy for motor vehicles |
Country Status (6)
Country | Link |
---|---|
US (1) | US9039071B2 (en) |
JP (1) | JP5695725B2 (en) |
KR (1) | KR101519750B1 (en) |
CN (1) | CN103863230B (en) |
DE (1) | DE102012112419B4 (en) |
FR (1) | FR2999516B1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3741593A (en) * | 1970-12-21 | 1973-06-26 | A Toti | Structural assembly joint and method forming same |
US3746378A (en) * | 1971-07-08 | 1973-07-17 | Usm Corp | Structural assembly and deformable clip |
US8246091B1 (en) * | 2011-08-10 | 2012-08-21 | Ford Global Technologies, Llc | Inertia-locking reactive bumper for motor vehicle |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3595335A (en) | 1969-09-25 | 1971-07-27 | Budd Co | Front end vehicle body structure |
DE2441557A1 (en) * | 1974-08-30 | 1976-03-11 | Messerschmitt Boelkow Blohm | Impact absorbing car bumper - with collapsible mounting for elastic shock absorber of replaceable honeycomb material |
US4043585A (en) | 1975-03-26 | 1977-08-23 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Buffer for vehicle |
DE19822201B4 (en) | 1998-05-16 | 2004-09-16 | Dr.Ing.H.C. F. Porsche Ag | Safety device for motor vehicles |
FR2790527B1 (en) | 1999-03-05 | 2001-05-11 | Plastic Omnium Cie | PARTITIONED SHOCK ABSORBER MADE IN TWO NECKED BLOCKS AND BUMPER BEAM COMPRISING SUCH A SHOCK ABSORBER |
DE10221299C1 (en) | 2002-05-14 | 2003-10-30 | Porsche Ag | Automobile front axle component has attached stabiliser fixing clamps designed for absorbing impact in crash situation |
JP2005247184A (en) | 2004-03-05 | 2005-09-15 | Honda Motor Co Ltd | Uniting structure for automobile frame material |
US7699346B2 (en) | 2005-03-23 | 2010-04-20 | Chrysler Group Llc | Force redistributing system for a vehicle in the event of a rear impact |
JP2007223532A (en) * | 2006-02-24 | 2007-09-06 | Toyota Motor Corp | Vehicle body front structure |
DE112008000827T5 (en) | 2007-03-30 | 2010-02-04 | Honda Motor Co., Ltd. | Vehicle body rear structure |
JP2009083756A (en) * | 2007-10-02 | 2009-04-23 | Toyota Motor Corp | Vehicular side member structure |
DE102009041767B4 (en) * | 2009-09-16 | 2016-02-25 | Audi Ag | Connecting arrangement between a longitudinal member with a hollow profile and a body structure of a motor vehicle |
-
2012
- 2012-12-17 DE DE102012112419.1A patent/DE102012112419B4/en active Active
-
2013
- 2013-12-11 FR FR1362414A patent/FR2999516B1/en not_active Expired - Fee Related
- 2013-12-12 KR KR1020130154621A patent/KR101519750B1/en active IP Right Grant
- 2013-12-13 CN CN201310684539.9A patent/CN103863230B/en active Active
- 2013-12-16 JP JP2013258899A patent/JP5695725B2/en active Active
- 2013-12-16 US US14/107,467 patent/US9039071B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3741593A (en) * | 1970-12-21 | 1973-06-26 | A Toti | Structural assembly joint and method forming same |
US3746378A (en) * | 1971-07-08 | 1973-07-17 | Usm Corp | Structural assembly and deformable clip |
US8246091B1 (en) * | 2011-08-10 | 2012-08-21 | Ford Global Technologies, Llc | Inertia-locking reactive bumper for motor vehicle |
Also Published As
Publication number | Publication date |
---|---|
KR20140078553A (en) | 2014-06-25 |
JP2014122020A (en) | 2014-07-03 |
FR2999516A1 (en) | 2014-06-20 |
CN103863230B (en) | 2016-06-01 |
FR2999516B1 (en) | 2015-07-03 |
JP5695725B2 (en) | 2015-04-08 |
DE102012112419B4 (en) | 2020-08-27 |
DE102012112419A1 (en) | 2014-06-18 |
CN103863230A (en) | 2014-06-18 |
US9039071B2 (en) | 2015-05-26 |
KR101519750B1 (en) | 2015-05-12 |
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